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DeprecatedThis feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The obsolete Document interface's fullscreen read-only property reports whether or not the document is currently displaying content in full-screen mode.

Although this property is read-only, it will not throw if it is modified (even in strict mode); the setter is a no-operation and it will be ignored.

Note: Since this property is deprecated, you can determine if full-screen mode is active on the document by checking to see if Document.fullscreenElement is not null.

Syntax

var isFullScreen = document.fullscreen;

Value

A Boolean value which is true if the document is currently displaying an element in full-screen mode; otherwise, the value is false.

Example

This simple function reports whether or not full-screen mode is currently active, using the obsolete fullscreen property.

function isDocumentInFullScreenMode() {
return document.fullscreen;
}

This next example, on the other hand, uses the current fullscreenElement property to determine the same thing:

Disabled From version 49 until version 65 (exclusive): this feature is behind the full-screen-api.unprefix.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

No support9 — 65

Alternate Name

Alternate Name Uses the non-standard name: mozFullScreen

IENo support
No

OperaFull support
58

Full support
58

Full support
15

Alternate Name

Alternate Name Uses the non-standard name: webkitIsFullscreen

SafariFull support
6

Alternate Name

Full support
6

Alternate Name

Alternate Name Uses the non-standard name: webkitIsFullScreen

WebView AndroidFull support
71

Full support
71

Full support
≤37

Alternate Name

Alternate Name Uses the non-standard name: webkitIsFullscreen

Chrome AndroidFull support
71

Full support
71

Full support
18

Alternate Name

Alternate Name Uses the non-standard name: webkitIsFullscreen

Firefox AndroidFull support
64

Full support
64

No support49 — 65

Disabled

Disabled From version 49 until version 65 (exclusive): this feature is behind the full-screen-api.unprefix.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.